If you've played games like Team Fortress 2 or the Portal titles, you know that Valve loves…
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I don't think Kotaku has ever posted this incredible interpretative Portal dance number. What makes me grin at the work done by the Ninja of the Night cosplay troupe is the way they bring the game's mind-bending moments to life on the stage. Everyone remembers the moment when first looked at themselves through one of the game's wormhole openings. The recreation of that revelation gets a big pop from the crowd and deservedly so. Great stuff.